@article {1589, title = { Tuning the Photoactivity of Zirconia NanotubesBased Photoanodes Via Ultra-Thin Layers of Zrn: An Effective Approach Towards Visible Light-Water Splitting}, journal = { J. Phys. Chem.}, year = {2016}, author = {Amer, A. W. and El-Sayed, M. A. and Allam, N. K.} }